LeBron's Mother -- The Valet SLAP FOOTAGE

4/13/2011 10:00 AM PDT

[VIDEO] Lebron James Mom Gloria -- The Slap Surveillance Video

TMZ has obtained security footage showing LeBron James' mother slapping a parking valet at a hotel in Miami Beach last week ... but the video shows Gloria James may NOT have made the first move.

During the encounter ... Gloria walks up to the valet, Rockfeller Sorel, and gets in his face over the parking situation. As Gloria verbally unloads, Rockfeller takes an advancing step towards Gloria and bumps her.

Gloria quickly recovers and unleashes the slap heard 'round the world with her left hand -- and then swings her purse at the guy's head with her right hand.